RPC programming

[Mike Hoegeman]

In article <8008 at cs.utexas.edu> tph at cs.utexas.edu (Pow-Hwee Tan) writes:
 >Howdy!
 >I have just started doing some NFS programming using RPC and XDR, and
 >have the following questions which I hope some of you can enlighten
 >me.
 >1.  I am using the intermediate RPC layer of function calls as described
 >in Sun's documenation.  The two functions calls I used are callprc and
 >registerrpc.  Both of these functions require a program number as
 >parameter.  As I understand from the documentation, I can use the numbers
 >in the range 0x20000000 - 0x3fffffff.  Am I right?  Or do I need to
 >make some kind of call to find out what number I should use?

there is no call to get an OK program number , just use one in the 
temporary range. 

also, just from the general tone of your message, i would guess that you
need to read up on RPCGEN, which is an RPC client <-->server protocol
compiler. this will do a lot of the mechanical rpc coding for you.
it will elminate you needing to things like 'registerrpc'.

 
 >2.  The XDR serializing/deserializing routines do not explicitly free
 >the memory allocated.  How can I free them myself?

for free client side xdr memory, check out clnt_freeres in the RPC(3N)
man page for sunOS.  you should'nt need anything on the server side if
you use RPCGEN.  also check out clnt_create, clnt_call, and
clnt_destory.  you should really use these instead of callrpc. in fact,
if you use RPCGEN you just call a canned routine that RPCGEN makes for
you from your protocol description.